-81.33% is the change from 991 to 185
Calculation steps:
[( 185 - 991 ) ÷ 991] x 100 = -81.33%
Formula
Percentage change = [(185 - 991) / 991] x 100
Subtract the new number by the original number
185 - 991 = -806
-806 ÷ 991 = -0.8133198789101918
-0.8133198789101918 x 100 = -81.33%